If you don't want to export the entire sheet then you can try to export the chart object. I mean you can loop through each chart object in each sheet and export them to PPT. Is this what you are looking for?

I'd like to build my whole dashboard in a sheet and export the overall sheet as image without taking care of my current resolution but in best case, entering the requesed part of sheet to be extracted.

Thanks for explaining in detail. Now I have understood the requirement. There is no built-in feature to take customize the screenshot selection. However, I have some ideas of integrating as extension objects with an open source screenshot application with QlikView. I'll experiment with this and I'll update you if I can get this working.

I am looking for the same functionality as Jerome. Have you further developed yoour ideas since the discusison with Jerome. I mean your ideas on exporting to ppt ignoring the screensize that the dashboard happens to be at?